The Electronic Code of Federal Regulations (e-CFR) is a regularly updated, unofficial editorial compilation of CFR material and Federal Register amendments produced by the National Archives and Records Administration's Office of the Federal Register (OFR) and the Government Publishing Office.

Parallel Table of Authorities and Rules for the Code of Federal Regulations and the United States Code Text | PDF

Find, review, and submit comments on Federal rules that are open for comment and published in the Federal Register using Regulations.gov.

§21.11 Standard organization of the Code of Federal Regulations.

(a) Titles, which are numbered consecutively in Arabic throughout the Code;

(b) Subtitles, which are lettered consecutively in capitals throughout the title;

(c) Chapters, which are numbered consecutively in Roman capitals throughout each title;

(d) Subchapters, which are lettered consecutively in capitals throughout the chapter;

(e) Parts, which are numbered in Arabic throughout each title;

(f) Subparts, which are lettered in capitals;

(g) Sections, which are numbered in Arabic throughout each part. A section number includes the number of the part followed by a period and the number of the section. For example, the section number for section 15 of part 21 is “§21.15”; and